A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Standard

A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys. / Tiedje, Niels Skat; Hattel, Jesper Henri; Taylor, J. A.; Easton, M. A.

The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd, 2012. p. 012033 (IOP Conference Series: Materials Science and Engineering, Vol. 27).

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Harvard

Tiedje, NS, Hattel, JH, Taylor, JA & Easton, MA 2012, 'A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys'. in The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd, pp. 012033. IOP Conference Series: Materials Science and Engineering, vol. 27, , 10.1088/1757-899X/27/1/012033

APA

Tiedje, N. S., Hattel, J. H., Taylor, J. A., & Easton, M. A. (2012). A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys. In The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. (pp. 012033). IOP Publishing Ltd. (IOP Conference Series: Materials Science and Engineering, Vol. 27). 10.1088/1757-899X/27/1/012033

CBE

Tiedje NS, Hattel JH, Taylor JA, Easton MA. 2012. A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys. In The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd. pp. 012033. (IOP Conference Series: Materials Science and Engineering, Vol. 27). Available from: 10.1088/1757-899X/27/1/012033

MLA

Tiedje, Niels Skat et al. "A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys". The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd. 2012. 012033. (IOP Conference Series: Materials Science and Engineering, Volume 27). Available: 10.1088/1757-899X/27/1/012033

Vancouver

Tiedje NS, Hattel JH, Taylor JA, Easton MA. A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys. In The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd. 2012. p. 012033. (IOP Conference Series: Materials Science and Engineering, Vol. 27). Available from: 10.1088/1757-899X/27/1/012033

Author

Tiedje, Niels Skat; Hattel, Jesper Henri; Taylor, J. A.; Easton, M. A. / A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys.

The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011. IOP Publishing Ltd, 2012. p. 012033 (IOP Conference Series: Materials Science and Engineering, Vol. 27).

Publication: Research - peer-reviewArticle in proceedings – Annual report year: 2012

Bibtex

@inbook{db1f162f5f4a48689de0087cf57d0555,
title = "A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys",
publisher = "IOP Publishing Ltd",
author = "Tiedje, {Niels Skat} and Hattel, {Jesper Henri} and Taylor, {J. A.} and Easton, {M. A.}",
year = "2012",
doi = "10.1088/1757-899X/27/1/012033",
series = "IOP Conference Series: Materials Science and Engineering",
pages = "012033",
booktitle = "The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011",

}

RIS

TY - GEN

T1 - A solidification model for unmodified, Na-modified and Sr-modified Al-Si alloys

A1 - Tiedje,Niels Skat

A1 - Hattel,Jesper Henri

A1 - Taylor,J. A.

A1 - Easton,M. A.

AU - Tiedje,Niels Skat

AU - Hattel,Jesper Henri

AU - Taylor,J. A.

AU - Easton,M. A.

PB - IOP Publishing Ltd

PY - 2012

Y1 - 2012

N2 - An addition of small amounts of Na and Sr is commonly used in the industry to modify the eutectic in Al-Si alloys. Both Na and Sr suppress nucleation of the eutectic forcing nucleation and growth to take place at higher undercooling than in the unmodified material. Thus the scale of the eutectic and the shape of the Si crystals are modified to a fine fibrous form so that the ductility of the material is increased. In the present work a one-dimensional numerical model is proposed that describes nucleation and growth of both primary dendrites and eutectic grains as a function of cooling conditions and modification. The model assumes that dendrites nucleate easily when the liquidus temperature is reached and that they grow as heat is extracted by the mould. Nucleation of the eutectic grains depends on local undercooling and growth is governed by a balance between growth of the eutectic grains and the rate at which heat is extracted by the mould. Experimental data is used to determine constants in the nucleation function. It is shown how cooling conditions and mode of modification influence nucleation and growth conditions.

AB - An addition of small amounts of Na and Sr is commonly used in the industry to modify the eutectic in Al-Si alloys. Both Na and Sr suppress nucleation of the eutectic forcing nucleation and growth to take place at higher undercooling than in the unmodified material. Thus the scale of the eutectic and the shape of the Si crystals are modified to a fine fibrous form so that the ductility of the material is increased. In the present work a one-dimensional numerical model is proposed that describes nucleation and growth of both primary dendrites and eutectic grains as a function of cooling conditions and modification. The model assumes that dendrites nucleate easily when the liquidus temperature is reached and that they grow as heat is extracted by the mould. Nucleation of the eutectic grains depends on local undercooling and growth is governed by a balance between growth of the eutectic grains and the rate at which heat is extracted by the mould. Experimental data is used to determine constants in the nucleation function. It is shown how cooling conditions and mode of modification influence nucleation and growth conditions.

KW - MATERIALS

KW - METALLURGY

KW - PHYSICS,

KW - ALUMINUM-SILICON ALLOYS

KW - EUTECTIC ALLOYS

KW - TEMPERATURE

U2 - 10.1088/1757-899X/27/1/012033

DO - 10.1088/1757-899X/27/1/012033

BT - The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011

T2 - The 3rd International Conference on Advances in Solidification Processes, Rolduc Abbey 2011

T3 - IOP Conference Series: Materials Science and Engineering

T3 - en_GB

SP - 012033

ER -